# 2025 Open Nouvelle-Calédonie – Singles

Arthur Cazaux was the defending champion but chose not to defend his title.
Shintaro Mochizuki won the title after defeating Moerani Bouzige 6–1, 6–3 in the final.

## Seeds

* Adrian Mannarino (first round)
* Márton Fucsovics (quarterfinals)
* Jesper de Jong (first round)
* Valentin Vacherot (quarterfinals)
* Elmer Møller (first round)
* Jurij Rodionov (semifinals)
* Gijs Brouwer (second round)
* Constant Lestienne (semifinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| 6 | Jurij Rodionov | 3 | 3 | | | | |
| | Shintaro Mochizuki | 6 | 6 | | | | |
| | Shintaro Mochizuki | 6 | 6 | | Shintaro Mochizuki | 6 | 6 |
| | | | | | Moerani Bouzige | 1 | 3 |
| 8 | Constant Lestienne | 7$^7$ | 3 | 4 | Moerani Bouzige | 1 | 3 |
| | Moerani Bouzige | 6$^3$ | 6 | 6 | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | A Mannarino | 3 | 0 | | | | | | | | | | | | | | | |
| | Y Takahashi | 6 | 6 | | | Y Takahashi | 3 | 4 | | | | | | | | | | |
| | K Pannu | 6 | 4 | 1 | | E Couacaud | 6 | 6 | | | | | | | | | | |
| | E Couacaud | 4 | 6 | 6 | | | | | | | E Couacaud | 6 | 4 | 2 | | | | |
| WC | B Paire | 6$^4$ | 6 | 7 | | | | | | 6 | J Rodionov | 4 | 6 | 6 | | | | |
| | C Sinclair | 7$^7$ | 1 | 5 | WC | B Paire | 4 | 7 | 2 | | | | | | | | | |
| Q | B Bayldon | 4 | 2 | | 6 | J Rodionov | 6 | 5 | 6 | | | | | | | | | |
| 6 | J Rodionov | 6 | 6 | | | | | | | | | | | | 6 | J Rodionov | 3 | 3 |
| 3 | J de Jong | 4 | 6$^5$ | | | | | | | | | | | | | S Mochizuki | 6 | 6 |
| | Andre Ilagan | 6 | 7$^7$ | | | A Ilagan | 7$^7$ | 4 | 2 | | | | | | | | | |
| | Keisuke Saitoh | 4 | 4 | | | S Mochizuki | 6$^5$ | 6 | 6 | | | | | | | | | |
| | S Mochizuki | 6 | 6 | | | | | | | | S Mochizuki | 6 | 6 | | | | | |
| | T Ichikawa | 6 | 2 | 6 | | | | | | | T Ichikawa | 3 | 3 | | | | | |
| Q | Liam Branger | 4 | 6 | 2 | | T Ichikawa | 6 | 6 | | | | | | | | | | |
| | B Tomic | 4 | 1 | | 7 | G Brouwer | 1 | 4 | | | | | | | | | | |
| 7 | G Brouwer | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | C Lestienne | 6 | 6 | | | | | | | | | | | | | | | | |
| Q | Ja Delaney | 3 | 3 | | 8 | C Lestienne | 5 | 6 | 7$^7$ | | | | | | | | | | |
| WC | Heremana Courte | 1 | 2 | | | A Holmgren | 7 | 2 | 6$^1$ | | | | | | | | | | |
| | A Holmgren | 6 | 6 | | | | | | | 8 | C Lestienne | 6 | 4 | 7 | | | | | |
| | Ryotaro Taguchi | 6 | 6 | | | | | | | 4 | V Vacherot | 2 | 6 | 5 | | | | | |
| | AD Vallejo | 3 | 4 | | | R Taguchi | 1 | 2 | | | | | | | | | | | |
| Q | S Hazawa | 3 | 4 | | 4 | V Vacherot | 6 | 6 | | | | | | | | | | | |
| 4 | V Vacherot | 6 | 6 | | | | | | | | | | | | 8 | C Lestienne | 7$^7$ | 3 | 4 |
| 5 | E Møller | 6 | 3 | 3 | | | | | | | | | | | | M Bouzige | 6$^3$ | 6 | 6 |
| | M Bouzige | 4 | 6 | 6 | | M Bouzige | 7 | 6 | | | | | | | | | | | |
| WC | Charlie Camus | 6 | 6 | | WC | C Camus | 5 | 3 | | | | | | | | | | | |
| Q | Kosuke Ogura | 2 | 1 | | | | | | | | M Bouzige | 6 | 6 | | | | | | |
| | M Janvier | 6 | 6 | | | | | | | 2 | M Fucsovics | 3 | 3 | | | | | | |
| | Ryuki Matsuda | 3 | 3 | | | M Janvier | 4 | 6 | 3 | | | | | | | | | | |
| Q | F Cabral | 2 | 3 | | 2 | M Fucsovics | 6 | 3 | 6 | | | | | | | | | | |
| 2 | M Fucsovics | 6 | 6 | | | | | | | | | | | | | | | | |